Tack-pulling machine



Sept. 4, 1928. 1,682,808

C. N. SPINNEY ET AL TACK PULLING MACHINE Patented Sept. 4, 1928.

UNITED STATES e TENT OFFliCE.

CLEVELAND N. SPINNEY, or r raanrssnne, PEN S VA IA, line men 1... time. are, or seventy, MASSACHUSETTS, nssrenons r warren snon M AoHmnRY oonronarron, or EATER-SON, NEW JnnsnY, A coRroRATIoN on NEW JERsnYQf Teen-rewrite MACHINE.

Application filed April 30, 1925; Serial No; 26,953.

Our invention relates to apparatus for removing tacks from work into which they have been driven as temporary securing means; for example, thoseholding the insoles of shoes in place upon their lasts during the lasting operation. a i

The movable member by which tacks are pulled commonly is associated with a member which contacts with the work and furnishes a guard. Ordinarily, the tacks are not fully driven, or the heads are not depressed below the surface ofthe work; and under such conditions, it is effective to operate the pulling member close to the work-engaging surface of the guard. With this relation, the pulling member may be caused to engage and draw tacks from work heldagainst the guard without digging into and mutilating the worksurtace. But if a tack is driven deeply, this fined membermay prevent theproper action ofthe pulling tool by holding the work too far from the path ofthe latter.

ilnobject of the invention is to furnish an ellicient organization, by which tacks may be pulled with certainty, regardless of the extent to which they are driven, and by which a positive and unvarying resistance is opposed to the pullingstress. For the accomplishment of this object, weihave provided a pulling member, as an oscillatory claw, which is not only inovableto produce the tack-drawing action, which may bein co-operationwith a contact member or guard, but which is also independently movable. This last-mentioned movement may takeplace during the pulling movement of the pulliru; member and may "vary its relation to the contact member, which ispreferably fixed in position. By such an adjustment with respect to the contact-Sui face, the ellective stroke oftlie pullingimeniher is increased, so that it may better engage the heads of tacks driven close to or embedded in the work. i For the purpose of this adjust ment, we haveherein illustrated a horizontal pivotal support for-the pulling member variable in position, as by an eccentric action, this eccentric support being controlled by a treadle for actuationby the operatorat such times as the increased digging effect or projectionof the pulling member beyond the guard is desired.

One of the severalembodiinents which the intention ina v sumo illustrated in the no Flgql shows, in brokenxside elevation, a

taclt pulling machine to which our i1nprovements are applied; i i

Fig. 2 is a partial front elevation, looking from theleftin Fig.1; a 3

Fig. 3 isa broken top plan View particu; larly illustrating the support of the pulling arm; while i i i j Figs. 4: and 5 show,in side elevationythe relation existing between the work, the guard and the pulling member for normal operation and for the deeper digging action, respec tively.

At the forward I extremity of an overhang ing frarne-arm 10 is mounted fixedly a guard member-12 provided with spacedwallskld, 14, the lower rounded edges 16, 16 ofwhich fur? nishcontactsurtaces. Againstthese surfaces the bottom of an insole I or other work may be pressed, and over them advancedto receive the action of a claw or pulling member 18 upon tacks T, which are shown in Fi e. 4 and 5 of the drawings assecuriiig the insole to a last L. The pulling meniberor' tool 18 is clamped by screws .20 in av downwardly and outwardly inclined position atthe forward divided end of a lever 2;,which, atits eppo f site extremity, is driven toosoillate thetool between the guard-walls 14: by an eccentric Q lor other power actuated means carried by a shaft 26=1ournaled in the frame. Between at 28 by a link 30, which is, initurn, supported upon a spindle 82' extending horizontally across the frame. Mounted to turn inthe frame is a sleeve 34 having eccentric to its axis ahorizon tal openingwhieh receives the spindle32. To theend of the sleeve opposite the link 30is attached anarni' dfidrawn by a T spring 38, j0ining it tothefra ne, against a stop-scrci'v d0 threaded 3 6111103 1137 through a: lug projecting at one side ofthe'franie'. A

connecting-rodtQ is pivoted-tothe outer end of the *arn'1'36 and'to aftreadle 44E movable 8b the eccentric and tool, the arm is suspended ity of the path of movement is in proximity to the surfaces 16, 16 of the guard as the tool moves into the space between the forks of said uard. This normal relation me be vari as desired, by an adjustment 0 the screw 40. The'operator, resting the bottom of an insole I, from which the securing tacks T are to be drawn, against the surfaces 16, moves said tacks successively into the field of operation of the tool, as is particularly illustrated in Fig. 4 of the drawings. Said tool engages and pulls them during its upward stroke in the usual manner. Observing that a tack is more deeply driven,'as appears in Fig. 5, so'that the guard would prevent the tool in its normal position from passing. under the head, the operator depresses the treadle 44. The arm 36 is thereby dropped, rotating the sleeve 34, and lowering the spindle 32. This,in turn, carries down the link 30, and consequently the supporting point 28 of the pulling lever, locating theengaging end of the tool below the surfaces 16 of the guard. The relation is now as appears in Fig. 5, and at this time firmer upward pressure by the operator causes the tool to force the insole material away from the head of the tack and to reach the under side of said head tovelfectively accomplish its withdrawal. However the tool is positioned by the eccentric support, the guard is always securely fixed in position, so the work is held by it against upward movement, to resist the pull of the tool. This immobility of the guard also minimizes the vibration transmitted from the tool through the work to the hands of the operator. Asto the support of the lever 22, the tendency to rotate theeccentric b the pulling action is negligible, being easi y opposed by the spring 38 in the normal position, and by the pressure of the operators foot upon the,l treadle 44. in the digging stroke of the too r Having described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a tack-pulling machine to which work may be manually presented by an operator, a membermovahle toward and away from the operator to. pull tacks, and means arranged to move the pulling member independently of its pulling movement during the operation of the machme.

2. In a tack-pulling machine, a movable pullingmember, means for imparting to the member a combined forward and upward pulling movement, and means operable during the pulling movement and arranged to adjust the position of the ulling member. 3. In a tack-pulling mac 'ne, a member movableabout a horizontal axis to pull tacks, a member co-operating with the pulling member and contacting with the work, and means arranged to control the position of said axis to vary the relation of the pulling member to the contact member independently of the pulling movement.

4. In a tack-pulling machine. a forked guard provided with a surface for contact with the work, a pulling member oscillatable into the space between said forks, power means for driving the pulling member, and operator-controlled means for varying the path of movement of said member during its pulling movement to change its relation to the contact-surface of the guard.

5. In a tack-pulling machine, a frame. a guard fixedly mounted on the frame for con tact with the work, a pullin member movable inan approximately el iptical path in proximity to t work, and means operable during the operation of the machine arranged toadjust the relation to the guard of the tool.

6. In a tack-pulling macihne, a movable e guard to pull tacks from the support, a pulling member movably carried upon said support, means for imparting to the member a pulling movement upon the support in a closed path extending toward and away from the operator, and means arranged to vary the position of the support and thereby the relation of the pulling member to the work.

7. The combination with an oscillatory tack-pulling claw, of driving means for said claw, a guard adjacent to which the claw oscillates, and means adjustable during the operation of the-machine arranged to change the path of movement of the claw to vary the relation of the claw to the guard.

8. In a tack-pulling machine, a pullin member, a guard co-operating therewith and having a surface for contact with the work, means for imparting to the member its pulling movement, and means arranged to adjust the pulling member toward and from the contact-surface of the guard while the machine is in operation.

9. The combination with a pullin member, of means for imparting to sai member its pulling movement, and an eccentric support for the member.

10. The combination with a tackulling member, of means for imparting to said member its pulling movement, an eccentric support for the member, and treadle-connections arranged to move the support.

, 11. In a tack-pulling machine, a frame, a

guard carried thereby, a sleeve having a bearing in the frame and provided with an eccentric opening, a spindle carried in the opening,.a link suspended upon the spindle, a pulling lever pivoted upon the link and extending into proximity with a the guard, and driving means acting upon the lever.

12..In a tack-pulling machine, a frame, a guard carried thereby, a sleeve having a bearing in the frame and provided with an eccentric opening, treadle-connections arranged to turn the sleeve, a spindle carried in the opening, a link suspended upon the spindle, a pulling lever pivoted upon the link and extending into proximity with the guard, and driving means acting upon the lever.

13. In a tack-pulling machine, an oscillatory tack-pulling claw, a link for supporting said claw, driving means for said claw, a guard adjacent to which the claw oscillates, and means arranged to change the position of the supporting link independently of the movement of the tack-pulling claw, thereby to change the relation of the claw to the guard.

14. In a tack-pulling machine, a frame, a guard carried thereby, a horizontally disposed spindle, an eccentric support for said spindle in said frame, a tack-pulling member pivotally supported from said spindle, means for imparting a tack-pulling movement toward and away from the guard to said tack-pulling member, and operator-controlled means for varying the position of said eccentric support.

15. In a tack-pulling machine, a frame, a guard carried by said frame having a surface for contact with the work, a tack-pulling member, means for imparting to said member an oscillatory movement in an approximately elliptical path toward and away from the guard, and means arranged to adjust the pulling member toward and from the contact surface of the guard operative dur- Iijng the tack-pulling movement of said mem- 16. In a tack-pulling machine, the combination of a movable support, a tack-pulling member carried by the support, means for imparting to the tack-pulling member movement relatively to the support in a. curved path toward the tack to be pulledand then in a direction lengthwise of the tack to pull the tack from the work, a treadle, and connections between the treadle and the support arranged to cause displacement of the treadle to move the support and thereby tochange the relation of the tack-pulling member to the work. 7 a

17. In a tack-pulling machine, the combination of a movable tack-pulling member, means for imparting to said member a combined forward and upwardpulling movement, a treadle, and connections from the treadle to the tack-pulling member arranged to cause displacement Oftlle treadle to change the path of movement of the tack-pulling member. x

In testimony whereof I, the said CLEVE- LAND N. SPINNEY, have signed my name to this specification.

CLEVELAND N. SPINNEY.

In testimony whereof I, the said FRED L.

MACKENZIE, have signed my nameto this specification.

FRED L. MACKENZIE. 

